What's Her Best Hair?

In true supermodel fashion, takes her look to a whole new level with instant inches of honey-blonde hair. After a brief encounter with long, straight hair, curled up with a mane of ringlets. The Mad Men star stepped out of character, swapping her short cut for longer, romantic locks.

HEIDI KLUM

Michael Loccisano/Getty; Jens Hartmann/Rex USA

In true supermodel fashion, takes her look to a whole new level with instant inches of honey-blonde hair.

RIHANNA

Henry S. Dziekan III/Getty; Steve Granitz/WireImage

After a brief encounter with long, straight hair, curled up with a mane of ringlets.

ELISABETH MOSS

Martin Roe/Retna; Amanda Schwab/Startraks

The Mad Men star stepped out of character, swapping her short cut for longer, romantic locks.

ASHLEY GREENE

Kevan Brooks/AdMedia; D Dipasupil/FilmMagic

The Twilight takes her hair to the dark (red) side after months with sunny highlights.

JULIANNE HOUGH

George Shepherd/AdMedia; Scott Kirkland/Globe

Could her “phenomenal have a thing for brunettes? heats up the CMA Awards red carpet with a darker hue that leaves her blonde hair color far behind.

ANNALYNNE MCCORD

Krista Kennell/Sipa; Luiz Martinez/Broadimage

The 90210 star evolves from a kitten to a lioness by letting her natural curls run wild.

LEELEE SOBIESKI

Jemal Countess/Getty; Nancy Kaszerman/Zuma

The young mom trims her collar-grazing curls into a chic-and-easy blunt bob.

JESSICA BIEL

Fotonoticias/WireImage; Debbie VanStory/iPhoto

sweetens her style with a new chocolate-brown hue.

ANNE HATHAWAY

Gilbert Flores/Celebrity Photo; Tina Kaawaloa/INF

After shaping her waves into a screen-siren coif, goes for ’60s-inspired drama by switching to a center part.

NICOLE RICHIE

Donato Sardella/WireImage; John Shearer/WireImage

Since debuting a blonde-bombshell bob earlier in the year, the has kept her hairdresser busy, taking the cut to shorter and shorter lengths.

RIHANNA

Jerritt Clark/Getty; Charles Sykes/AP

keeps her love affair with fire-engine red burning – but adds inches in length that puts her curls on the straight-and-narrow.

SCARLETT JOHANSSON

Kevin Winter/Getty; Target/Fame

After chopping off her long hair on a whim, has traded in her sexy tousled bob for a shorter, sleeker do.

ROSE BYRNE

Alex J. Berliner/BEI; Dave Allocca/Startraks

The Damages star adds heavy fringe to her long bob with the help of her mane man, Harry Josh.

LEONA LEWIS

Pascal Le Segretain/Getty Images; Paul Marks/Broadimage

The songstress trades her honey highlights for dark chocolate tresses and on-trend bangs at a movie premiere.

JULIA STILES

Jordan Strauss/WireImage; Jamie McCarthy/WireImage

The towheaded Dexter star takes her long hair up a notch, showing off blunt bangs during New York Fashion Week.

JENNIFER ANISTON

Christopher Polk/Getty; James Devaney/WireImage

Since her days rocking “The Rachel” in the 1990s, Aniston has stayed true to her long layers – but she changed up the look this week by trimming off a few inches of length.

LAUREN CONRAD

Mark Sullivan/WireImage; Alberto E. Rodriguez/Getty

The SoCal gives her look new life by darkening up her honey hair.

SANDRA BULLOCK

Peter Brooker/Rex USA; Steve Granitz/WireImage

The kicked off red carpet season with a bold beauty makeover: high-fashion blunt bangs.

KHLOE KARDASHIAN

Jason Merritt/Getty; GSI Media

“I had to dye my hair back to brown,” the reality star announced on Twitter, only days after dying her hair a strawberry blonde. “I love being a brunette don t get me wrong but red was SOO much fun! I was only red for a like a week :(,”

OLIVIA WILDE

Marion Curtis/Startraks; Kyle Rover/Startraks

The Tron star transformed her long hair with the addition of a lash-sweeping fringe.

KATE BECKINSALE

David Fisher/Rex USA; Flynet

Adios brown hair! The famous jetted to Mexico with a golden blonde color that left her almost unrecognizable.

MICHELLE WILLIAMS

Amanda Schwab/Startraks; Mike Marsland/WireImage

The singer abandons her on-trend short cut for another of-the-moment style: the sexy shag do.

CHRISTINA AGUILERA

Jon Furniss/WireImage; Semmer/Face To Face/iPhoto

The Burlesque says auf wiedersehen to her long waves, trading them for milk-maid braids at the movie’s Berlin premiere.

KRISTEN BELL

Jon Furniss/WireImage; Clemens Niehaus/Action Press/Zuma

stays true to her blonde-bombshell status, but makes over her look – just for the night – by faking a bob with a stylish tuck-under.

JESSICA ALBA

Gilbert Flores/CelebrityPhoto; Albert Michael/Startraks

“I wanted to go shorter, but I don t have the courage to go as short as I want – so this is like a happy medium. I can still throw it in a pony tail the told PEOPLE of her new sleek bob.

EMMA STONE

Vince Flores/AFF-USA; Jeffrey Mayer/WireImage

The Spider-Man star leaves behind her dyed-and-true auburn hair for her new role as a blunt-banged blonde.

ALEXA CHUNG

Gilbert Carrasquillo/FilmMagic; Michael Stewart/WireImage

The fashion maven accessorizes her look with a cropped cut that trims inches off her shoulder-length bob.

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